Project summaries: 2014-15 Floodplain management grants

Floodplain management grants 2014-15

Use the links below to view a summary of floodplain management grants for each Council.

Sources of funding

SFMP: State Floodplain Management Program

FRMGS: Floodplain Risk Management Grants Scheme

Organisation

Project title

Ashfield Council The Hawthorne and Dobroyd Canal Floodplain Risk Management Study and Plans

Bankstown City Council

Investigation and design of Milperra drain widening

Bathurst Regional Council

Bathurst flood mitigation - construction of Perthville levee

Kelso Voluntary Purchase

Bega Valley Shire Council

Bega and Brogo River Catchments Floodplain Risk Management Study and Plan

Bland Shire Council

Ungarie - Humbug Creek Flood Study - Stage 1

Burwood Council

Powells Creek - Exile Bay - St Lukes - William Street Flood Studies

Cabonne Council

Eugowra Voluntary Purchase

Molong Voluntary Purchase

Camden Council

Investigation and design Harrington Park mitigation works, Narellan - Nepean

Nepean River Floodplain Risk Management Study and Plan including Narellan Creek

Campbelltown City Council

Floodplain Risk Management Study and Plan Bow Bowing Bunbury Curran Creek Catchment

Council of the City of Sydney

Flood mitigation works concept design Coulson Street to Alexandra Canal

The city area and Darling Harbour catchments Floodplain Management Plan

Deniliquin Council Deniliquin Floodplain Risk Management Study and Plan - stage 2

Eurobodalla Shire Council

Flood prone access to Moruya Hospital - raising Murray Street Moruya

Reedy Creek Voluntary Purchase Scheme

Fairfield City Council

Fairfield Central Business District Floodplain Risk Management Study and Plan

Forbes Shire Council

Review of Forbes Floodplain Risk Management Plan

Gosford City Council Storm and flood forecasting study for Gosford
Greater Hume Shire Council Walla Walla Flood Study, Floodplain Risk Management Study and Plan

Greater Taree City Council

Review and update of Manning River Flood Study

Guyra Shire Council

Tingha Township Flood Study

Holroyd City Council Pendle Creek Floodplain Management Study and Plan
Hunter Local Land Services

Hunter Valley Flood Mitigation Scheme Review

Hunter Valley Flood Mitigation floodgate rehabilitation

Kempsey Shire Council Review of the Lower Macleay Floodplain Risk Management Study and Plan 1999
Kyogle Council Kyogle - flood modification measures - construction activities
Lake Macquarie City Council

Scoping study Lake Macquarie foreshore voluntary house raising

Marks Point and Belmont South Local Adaptation Plan and flood preparedness

Assessing the cost of frequent inundation and flooding on public infrastructure

Survey to support local adaptation plans

Upper Cockle Creek Flood Study and Flood Risk Management Flood Study and Plan review

Liverpool City Council

Brickmakers Creek Channel improvement works - Elizabeth Street to Campbell Street

Georges River Flood Study

Liverpool Central Business District overland flow path mapping

Liverpool Central Business District trunk drainage works - Elizabeth Street, George to College Street

Review of Liverpool Overland Flow Path Study

Lockhart Shire Council

Lockhart flood mitigation works detailed design - Stage 3

Lockhart Voluntary Purchase Feasibility Study - Stage 3

The Rock (East) Flood Mitigation Scheme detailed design - Stage 3

The Rock (West) Flood Mitigation Scheme detailed design - Stage 3

The Rock Voluntary Purchase Feasibility Study - Stage 3

Marrickville Council

Alexandra Canal Flood Study

Johnstons Creek Flood Study

Murrumbidgee Shire Council

Darlington Point floodplain management - reconstruction of levees areas 3 - 5A

Muswellbrook Shire Council Hunter River Flood Risk Management Plan

Narrandera Shire Council

Barellan Flood Study- Floodplain Risk Management Study and Plan

Newcastle City Council

Newcastle city-wide flood warning signage

Scoping study Morgan Selwyn floodway Merewether Heights

Palerang Council Braidwood Floodplain Risk Management Study and Plan

Parramatta City Council

Parramatta River Catchment Mainstream Flood Study

Penrith City Council

College, Orth and Werrington Creeks Catchment Overland Flood Study

Little Creek Catchment Overland Flood Study

South Creek Floodplain Risk Management Study and Plan

Richmond River County Council

Water Quality Monitoring - Richmond River Catchment

Richmond Valley flood warning and evacuation planning system - rural home floor

Lismore rural evacuation - house floor level plan

Flood evacuation South Lismore

Ryde City Council

Waterloo Park detention basin construction

Shoalhaven City Council Alexandra Street - Berry Town Creek vegetation and channel improvements

Strathfield Municipal Council

Powells Creek and Saleyards Creek Flood Study

Sutherland Shire Council Bundeena Creek Floodplain Risk Management Study and Plan

Tamworth Regional Council

Manilla Floodplain Risk Management Study and Plan

The Council of the City of Botany Bay Mascot, Rosebery and Eastlakes Floodplain Risk Management Study and Plan

The Council of the Municipality of Kiama

Surf Beach Catchment - Floodplain Risk Management Study and Plan

Wagga Wagga City Council

Wagga Wagga City Council - revised Floodplain Risk Management Study and Plan

Walcha Council

Walcha flood warning system - investigation and design

Walgett Shire Council

Walgett levee upgrade - Stage 3

Warringah Council

Narrabeen Lagoon flood mitigation (Entrance Clearance)

Wingecarribee Shire Council

Gibbergunyah Creek Floodplain Risk Management Study and Plan - Stage 2

Moss Vale Golf Course detention basin scoping study - Stage 3

Nattai Ponds Flood Study - Stage 1

Nattai River Floodplain Risk Management Study and Plan - Stage 2

Robertson Village Overland Flow Study - Stage 1

Wollongong City Council

Concept design of debris control structures - Allans Creek

Concept design of debris control structures - Collins Creek

Mullet Creek (Dapto) Voluntary Purchase Scheme

Woollahra Municipal Council

Paddington Flood Study

Wyong Shire Council

Ourimbah Creek Floodplain Risk Management Study and Plan review

Tuggerah Lakes Southern Catchments Overland Flood Study

Wyong River Flood Risk Management Study and Plan review

Wallarah Creek Flood Study

Ashfield Council

The Hawthorne and Dobroyd Canal Floodplain Risk Management Study and Plans (FRMGS)

Ashfield Council recently completed the NSW floodplain risk management process. The flood studies have identified extensive areas of flood prone properties including high hazard areas where there is a risk to life and property from a 1 in 100 year flood. This project will formulate a Floodplain Risk Management Plan for these areas.

Bankstown City Council

Investigation and design of Milperra drain widening (SFMP)

Investigation and design of the widening of Milperra Drain from 300 metres west (downstream) of Ashford Avenue to Henry Lawson Drive in Milperra.

Bathurst Regional Council

Bathurst flood mitigation - construction of Perthville levee (SFMP)

Completion of Perthville Town levee construction as designed.

Kelso Voluntary Purchase (SFMP)

The scheme is ongoing and is one element of a comprehensive integrated 1993 Floodplain Management Plan which was adopted by Bathurst City Council in 1995. The Kelso Voluntary Purchase Scheme identifies nearly 100 residential properties on the Kelso floodplain which are at high risk of flooding. Council commenced acquiring properties under the scheme in 1986/87 after a significant flood event in 1986. Council has purchased and demolished a significant number of the properties, with approximately 25 remaining. The properties listed for the Kelso Voluntary Purchase Scheme are included in the Bathurst City Council Floodplain Management Plan 1993.

Bega Valley Shire Council

Bega and Brogo River Catchments Floodplain Risk Management Study and Plan (FRMGS)

This stage involves the preparation of a Floodplain Risk Management (FRM) study and FRM plan for the Bega and Brogo River catchments and their corresponding settlements. It is proposed to identify risk management options with cost-benefit analysis, modelling and community engagement. Planning, emergency management, socio-economic and environmental impacts amongst others will be considered with a view of developing a FRM catchment plan for adoption by Council. Extension of the existing catchment modelling may also be required subject to financial constraints.

Bland Shire Council

Ungarie - Humbug Creek Flood Study - Stage 1 (FRMGS)

The aim of the flood study is to research historical data in order to provide a background to the various historical and eyewitness water heights, reached within the various sections of Humbug Creek and in various storm patterns. The flood study will also define the catchment into its sub-catchments and determine where each sub-catchment flows. The survey will be done, both from aerial data and on ground survey creating typical creek cross sections and model river flows, to be able to develop a rudimentary forward warning system. It will also enable us to proceed to a risk management study.

Burwood Council

Powells Creek - Exile Bay - St Lukes - William Street Flood Studies (FRMGS)

Burwood Council recognises the importance of undertaking overland flood studies to ensure that there are planning controls in place to protect future developments from the impact of flooding and to allow those currently living in flood prone areas to understand the flood risk. Council is currently finalising its first overland flood study for the Dobroyd Canal and Cooks River catchment.

Council now proposes to undertake an overland flood study of the four remaining sub catchments within its local government area.

Cabonne Council

Eugowra Voluntary Purchase (SFMP)

The progressive Eugowra voluntary purchase of houses identified in the adopted Flood Risk Management Study will allow severely flood affected residents to relocate out of the floodway and demolition of purchased properties will allow improved conveyance of flood waters.

Molong Voluntary Purchase (SFMP)

The progressive Molong voluntary purchase of houses identified in the adopted Flood Risk Management Scheme will allow severely flood affected residents to relocate out of the floodway and demolition of purchased properties will allow improved conveyance of flood waters.

Camden Council

Investigation and design Harrington Park mitigation works, Narellan - Nepean (SFMP)

Camden Council are undertaking an investigations, design and feasibility study of the mitigation options in order to implement works to manage flood risk for residents in Fairwater Gardens and Harrington Park.

Nepean River Floodplain Risk Management Study and Plan including Narellan Creek (SFMP)

The primary objective of this project is to define appropriate flood management measures and mitigation options to manage and reduce the impacts of flooding within the catchment. Council will also prepare planning and development controls to address cumulative impacts of potential development in the catchment.

Campbelltown City Council

Floodplain Risk Management Study and Plan Bow Bowing Bunbury Curran Creek Catchment (FRMGS)

Campbelltown City Council has completed 11 Draft Final Flood Studies for the Bow Bowing Bunbury Curran (BBBC) Creek Catchment. This grant will allow the preparation of a Floodplain Risk Management Study and Plan for the BBBC Creek Catchment. The purpose of the Floodplain Risk Management Study is to present the findings of the Flood Studies, to identify, assess and compare various risk management options and to consider opportunities for environmental enhancement as part of mitigation works.

Council of the City of Sydney

Flood mitigation works concept design Coulson Street to Alexandra Canal (SFMP)

This project will undertake detailed investigation and concept design for flood mitigation works to ameliorate flooding experienced by homes and businesses in the vicinity of Mitchell Road and Coulson Street, Erskineville.

The city area and Darling Harbour catchments Floodplain Management Plan (FRMGS)

This project will prepare the Floodplain Risk Management Study and Plan for the City Area and Darling Harbour Catchments. The study will investigate all available floodplain management options (structural and non-structural), recommend flood mitigation solutions and adopt a practical Floodplain Risk Management Plan for the catchments addressing the community needs.

Deniliquin Council

Deniliquin Floodplain Risk Management Study and Plan - stage 2 (SFMP)

This project will take the information from the flood study and use it to formulate a management plan for flood risk and flooding in Deniliquin. This plan will then inform decisions such as future planning for Deniliquin and the setting of a flood planning level.

Eurobodalla Shire Council

Flood prone access to Moruya Hospital - raising Murray Street Moruya (FRMGS)

The project is the provision of additional culverts under Murray Street either side of the existing culvert and the raising of the surface level of the road. These works will increase the availability of access across Gundary Creek by reducing the number of instances when the road is inundated.

Murray Street is the highest crossing of Gundary Creek and is the last access to the Moruya Hospital during a flood event. The need for raising Murray Street to reduce the loss of access to Moruya Hospital was identified in the Moruya Floodplain Risk Management Plan and is the only outstanding work of that Plan.

The project will, by increasing the flow area under the road and raising the level of the road, decrease the number of events that will prevent access to Moruya Hospital.

Reedy Creek Voluntary Purchase Scheme (SFMP)

The Reedy Creek Flood Study identified a number of properties as being inundated by the five per cent Annual Exceedance Probability event. A number of options were investigated and the Voluntary Purchase Scheme was determined as the most appropriate method of management. The available options were considered in the Reedy Creek Floodplain Risk Management Study and the voluntary purchase of nominated dwellings was identified as the highest priority.

Discussions have been held with the owners, with preliminary agreement being reached subject to a number of conditions. It is proposed to purchase one dwelling in the 2014/15 year and undertake earthworks on the property in 2015/16.

Fairfield City Council

Fairfield Central Business District Floodplain Risk Management Study and Plan (FRMGS)

The Fairfield Central Building District catchment is located in the western half of the Fairfield local government area (LGA) and covers 2.3 km². There are 7500 properties within the catchment, and approximately 2,000 properties are included in the floodplain outline defined by the Probable Maximum Flood event. This includes 57 parcels in the high (or partially high) flood risk precinct, 906 parcels in the medium (or partially medium) risk precinct and 1,106 parcels in the low risk (or partially low) precinct. This Flood Risk Management Study and Plan will identify and prioritise various flood mitigation options to address existing, future and continuing flood risk issues in one of Fairfield LGA's most dense localities.

Forbes Shire Council

Review of Forbes Floodplain Risk Management Plan (FRMGS)

Council would like to update its current one dimensional hydraulic flood model to a detailed two dimensional modelling using Lidar survey data covering Forbes and surrounds and then to revise the current Flood Risk Management Study and Plan(FRMS&P) including the update of the Floods Development Control Plan (DCP).

Gosford City Council

Storm and flood forecasting study for Gosford (FRMGS)

Council will undertake a study to investigate the existing locations of all data gauges, identify all stakeholders and their responsibilities, make recommendations to upgrade the existing system, and recommend the most appropriate form of communication for dissemination of the information to all stakeholders and the community.

Greater Hume Shire Council

Walla Walla Flood Study, Floodplain Risk Management Study and Plan (SFMP)

This project involves the completion of a comprehensive Flood Study for the Walla Walla Township aimed at identifying and mapping areas of flood risks due to both overland flow and main stream flooding. This will be immediately followed by the completion of a Floodplain Risk Management Study and Plan that will identify and prioritise floodplain management options aimed at reducing the impact due to flooding on the local community.

Greater Taree City Council

Review and update of Manning River Flood Study (FRMGS)

The study area comprises the Manning River catchment from downstream of Wingham to the coast which includes townships of Tinonee, Taree, Cundeltown, Croki, Harrington and Manning Point, and adjacent rural and semi-rural areas. The study area is within the local government area of Greater Taree City Council.

Guyra Shire Council

Tingha Township Flood Study (FRMGS)

The project aims to assess the risk associated with, and possible measures to, alleviate the potential risk of flooding in the Tingha township along Copes Creek to minimise damage and loss that occurs to public and private property.

Holroyd City Council

Pendle Creek Floodplain Management Study and Plan (SFMP)

The primary objective of the Floodplain Risk Management Study and Plan is to provide a range of management options to reduce flood impacts on properties in Pendle Creek.

Hunter Local Land Services

Hunter Valley Flood Mitigation Scheme Review (SFMP)

This study will allow Hunter Valley Flood Mitigation Scheme managers to determine the potential impacts of changing climatic conditions (including sea level rise), assess management options for the scheme and to prioritise future works required.

Hunter Valley Flood Mitigation floodgate rehabilitation (SFMP)

This project involves the rehabilitation of assets identified as having reached or exceeded their design life. A failure of any one of these structures has the potential to inundate large areas of surrounding towns and isolate landowners. Project works are based on a priority ranking. Priority has been given to locations where an asset (pipe/floodgate) directly impacts on another asset (levee).

Kempsey Shire Council

Review of the Lower Macleay Floodplain Risk Management Study and Plan 1999 (FRMGS)

A review of the 1999 Lower Macleay Floodplain Management Study and Plan is required. This review will address the following issues: flooding over the study area; flooding in the villages of Frederickton, Gladstone, Smithtown, Kinchela, Hat Head and Jerseyville; flooding in rural areas; drainage and water quality; climate change influence; bank erosion; and flood damages including economic costs and social impacts.

Kyogle Council

Kyogle - flood modification measures - construction activities (SFMP)

This project involves construction activities associated with the structural flood modification measures identified in Council's Floodplain Risk Management Plan, including a partial ring levee and additional Fawcetts Creek flood breakout.

Lake Macquarie City Council

Scoping study Lake Macquarie foreshore voluntary house raising (FRMGS)

This project is a scoping study for a voluntary house raising scheme for homes affected by flooding around the Lake Macquarie foreshore. This is an opportunity to use a financial incentive to help drive the pace of renovation and renewal of older homes, to lift them above the projected 2050 1 in 100 year flood level.

Marks Point and Belmont South Local Adaptation Plan and flood preparedness (FRMGS)

Lake Macquarie City Council will work with the community to develop a planning strategy to reduce the risk and develop a works program and emergency flood management program for the next decade. The project will assess the long-term cost and feasibility of maintaining key infrastructure and consider the practical options for modification, protection and retreat.

Assessing the cost of frequent inundation and flooding on public infrastructure (FRMGS)

This project will assess how projected changes in flooding, tidal inundation and groundwater will affect maintenance costs, deterioration curves and replacement intervals for assets, using real examples in communities such as Marks Point, Swansea and Dora Creek as case studies. This information will be used for flood risk management planning in affected communities, identify high priority works to protect, upgrade and maintain essential infrastructure and services.

Survey to support local adaptation plans (FRMGS)

This project will undertake a field survey of 1,600 properties to capture floor and property data which will be loaded into Council's flooding database.

Upper Cockle Creek Flood Study and Flood Risk Management Flood Study and Plan review (FRMGS)

Significant flooding of Upper Cockle Creek and its tributaries has been experienced on several occasions. The main issues this review project will address are: review and upgrade of flood study, hazards and hydraulic categories; assess the impact of climate change on flooding; and re-assess management options and strategies.

Liverpool City Council

Brickmakers Creek Channel improvement works - Elizabeth Street to Campbell Street (SFMP)

Brickmakers Creek is a tributary of Cabramatta Creek, which flows through the suburbs of Casula, Lurnea and Liverpool to meet Cabramatta Creek in Warwick Farm and subsequently Georges River. Flood studies undertaken in 1998 and 2004 have identified Brickmakers Creek as the primary cause of major flooding of parts of the northern Liverpool Central Business District (CBD), even in smaller storm events. The flooding extends to the major state arterials comprising of the Hume and Cumberland highways causing major traffic delays into and out of Liverpool and surrounding areas and the residential areas located adjoining the Hume Highway in the northern parts of the CBD.

The Floodplain Risk Management Plan adopted for Brickmakers Creek recommended a range of mitigation works. Among other flood mitigation works, the study recommended channel improvement works between Elizabeth Street and Orange Grove Road and construction of a detention basin at Amalfi Park to significantly attenuate flows and reduce flooding within the entire creek corridor and the northern CBD area.

Under stage one of flood mitigation works, channel improvement between Campbell Street and Orange Grove Road was completed in 2011 under funding assistance from Natural Disaster Mitigation Program. The work has shown immediate effect on parts of the area by relieving flooding of properties and roads which were previously affected from frequent storm events.

Council completed detailed design of Amalfi Park detention basin. Funding for basin construction has been approved under the State Government Floodplain Management Program and construction works have commenced.

This current project constitutes stage two of channel improvement works and will involve investigation and design of channel improvement work for the remaining channel section from Elizabeth Street to Campbell Street. Subsequent completion of proposed improvement works would further reduce flooding risks along Brickmakers Creek.

Georges River Flood Study (SFMP)

The Georges River catchment is one of the most populated catchments in Australia, located within the Sydney basin with a catchment area of approximately 930 square kilometres. The river traverses through a number of local government areas, including Liverpool, Fairfield, Bankstown and Sutherland local government authorities. The river and its tributary creeks represent Sydney's most immediate flooding problems, both in terms of the number of properties affected by flooding and the potential for increased flood damage due to development pressure within the catchment.

The Georges River Flood Study was undertaken in 1991 and design flood levels have been established from the results of a physical model constructed during 1980s by the Public Works Department. In 2004, the Georges River Floodplain Risk Management Study and Plan (FRMP) was prepared and adopted by all participating councils. As part of the FRMP a MIKE11 hydraulic model was developed.

Liverpool City is a regional city of South Western Sydney and is undergoing significant development and population growth. Accordingly, significant changes have occurred within the catchment in terms of landform and land use changes including filling and development within flood prone areas. These changes could potentially impact on flood behaviour and flood extent mapping.

In view of significant changes in landform and land use within the catchment since the original flood study was undertaken in 1991, Council proposes to undertake a review of the flood study for the Georges River. The proposed study will be undertaken using the most up to date ground survey data captured by Aerial Laser Scanning within Liverpool and a two-dimensional hydrodynamic model. The model would provide Council with a tool enabling strategic assessment of the impacts of developments and risk management options for existing and future developments within the catchment.

>

Liverpool Central Business District overland flow path mapping (FRMGS)

In 2005, Council undertook the Liverpool Central Business District (CBD) Floodplain Risk Management Study. The study assessed drainage capacity of existing pipe systems and identified major deficiencies in drainage capacities. Major trunk drainage upgrading works were recommended to alleviate flooding problems within the city centre.

Liverpool (CBD) trunk drainage works is an approved ongoing project under the NSW Government's Floodplain Management Program. Significant parts of the project have been completed using grant funding assistance under the State Floodplain Management Program. It is expected that the final and remaining stage of trunk drainage works will be completed in 2014-15.

The Liverpool Floodplain Management Study 2005 has assessed overland flooding and pipe drainage network performance using DRAINS hydraulic/hydrologic model. DRAINS model generates flood depths and velocities of overland flows at locations of overflow pits in the network in a tabular format. Due to modelling limitations, the DRAINS model does not generate flood inundation maps and flood level contour maps.

The NSW Floodplain Development Manual requires reviewing of flood studies and updating of flood maps to reflect changes in the catchments over the period since the flood study was undertaken. Since the flood study for the area was undertaken in 2005 significant changes have occurred within the catchment including construction of major trunk drainage works. For better understanding of flooding behaviour within the CBD area Council needs to update the flood study and develop flood risk maps. The proposed study will involve detailed hydrologic and hydraulic modelling of the CBD stormwater drainage system using two-dimensional hydraulic model and will prepare flood inundation maps including flood levels contours, flood hazard and flood risk maps. The modelling will enable Council to evaluate the effect of the completed trunk drainage system and will provide new tools for floodplain management.

Liverpool Central Business District trunk drainage works - Elizabeth Street, George to College Street (FRMGS)

Council's stormwater drainage system within the city centre is over capacity and has been the cause of frequent flooding within parts of the city. In order to mitigate the adverse impact of flooding Council undertook a detailed flood study for the city centre and developed Liverpool Central Business District (CBD) Floodplain Management Plan in 2005. The Plan recommended construction of large diameter trunk drainage pipes to significantly increase pipe system capacities to alleviate flooding of the CBD area.

Liverpool CBD trunk drainage works is an approved ongoing project. Significant parts of the project have already been completed using grant funding under the NSW Governments Floodplain Management Program.

Council commenced a staged construction program in July 2007 to provide a major underground drainage system and to date over 1.24 kilometres of pipelines have been constructed using both open cut and tunnel boring techniques. Works completed so far include installation of larger diameter pipes along College, Moore, George and Scott Streets, construction of a gross pollutant trap and construction of a major outfall structure on the western bank of the Georges River.

Council has recently completed the second last remaining part of the trunk drainage system along Scott and George streets under the State Floodplain Management Program.

Detailed design of the last remaining part of CBD trunk drainage works along Elizabeth Street is completed and the construction works are scheduled to commence in 2014-15.

Review of Liverpool Overland Flow Path Study (FRMGS)

Parts of Liverpool local government area (LGA) are subject to flooding from both mainstream and overland flooding. To manage occupation of flood prone lands, Council adopted a floodplain risk management policy to reduce impacts of flooding on properties and minimise damages from floods.

In 2006, Council completed a broad overland flow path study (overview study) of the entire LGA to identify and prioritise sub-catchments that would be prone to overland flooding. Council undertook detailed overland flow path studies of five of the largest and highest prioritised urban sub-catchment areas over the past few years. The detailed studies investigated overland flooding behaviour in further detail, and prepared flood inundation and flood risk mapping. Subsequently, Council undertook an overland flood risk management study for these areas which is now nearing completion.

During detailed overland flood studies, issues with catchment prioritisation in the overview study for a number of prioritised sub-catchments (for future detailed study) were identified. It was found that there are no overland flooding issues in some of the high priority sub-catchment areas identified by the overview study. However, overland flooding issues were identified in areas which were not identified in priority areas of the overview study. The discrepancy appears to be due to deficiency in the modelling methodology used in the overview study. It has become necessary to review the overland flow path study with finer modelling resolution to identify priority sub-catchments of the remaining urban areas before undertaking detailed overland flow path studies of those areas.

The proposed overland flow path study will involve undertaking an overland flow path study of the remaining Liverpool urban areas (i.e. excluding five sub-catchment areas completed under the detailed studies) with two-dimensional modelling with finer resolution. The study will identify overland flow paths within the study area and prioritise local sub-catchments for further detailed studies.

Lockhart Shire Council

Lockhart flood mitigation works detailed design - Stage 3 (SFMP)

Stage 3 works will produce detailed design plans to further reduce flood risk in Lockhart. This two part mitigation scheme will significantly reduce flood risk and associated damages throughout Lockhart. The Lockhart Government Dam Upgrade will reduce flooding in regions north of Green Street whilst the Brookong Street Drain will provide mitigation for regions between Green Street and Brookong Street.

Lockhart Voluntary Purchase Feasibility Study - Stage 3 (FRMGS)

In Lockhart 16 residences have been identified as being within the Brookong Creek floodway and in high hazard areas as defined by the Lockhart Flood Risk Management Study and Plan. During the recent 2010 and 2012 floods a number of residents that reside in these homes were evacuated by the NSW State Emergency Service. Homes situated in the floodway of Brookong Creek are exposed to considerable flood risk from the one per cent Annual Exceedance Probability event.

The Lockhart Flood Risk Management Study and Plan has recommended that a feasibility assessment be undertaken to determine community support of a voluntary purchase scheme.

The Rock (East) Flood Mitigation Scheme detailed design - Stage 3 (FRMGS)

These stage three works will produce detailed design plans to further overall work to reduce flood risk in The Rock.

This two part mitigation scheme comprising investigation and design funds are sought for will significantly reduce flood risk and associated damages throughout The Rock. Drain upgrades will improve transfer of water from Flowerpot Hill to Burkes Creek including by undertaking upgrades of Olympic Highway culverts as well as adding new drains and cleaning out of existing ones.

Twenty-six fewer lots will be flooded with 15 fewer properties flooded over floor in the one percent Annual Exceedance Probability event with implementation of the scheme and an average annual saving to the community of $71,400 per year is expected. Flood levels will be lower both upstream and downstream of the Olympic Highway and railway line.

The Rock (West) Flood Mitigation Scheme detailed design - Stage 3 (FRMGS)

This four part scheme is designed to reduce flooding in The Rock West. The scheme starts with a drain along Emily Street which conveys flow into the Nicholas Street basin. Flow is then transferred into a drain that travels along Yerong and then Urana streets before passing through the upgraded Urana Street culverts.

The Rock Voluntary Purchase Feasibility Study - Stage 3 (FRMGS)

At The Rock, three residences have been identified as being within the Burkes Creek floodway and in high hazards areas as defined by The Rock Flood Risk Management Study and Plan. During the recent 2010 and 2012 floods residents living in these homes were evacuated by the NSW State Emergency Service. Homes situated in the floodway of Burkes Creek are exposed to considerable flood risk from the one per cent Annual Exceedance Probability event.

The Rock Flood Risk Management Study and Plan has recommended that a feasibility assessment be undertaken to determine community support of a voluntary purchase scheme.

Marrickville Council

Alexandra Canal Flood Study (FRMGS)

Alexandra Canal drains the suburbs of St Peters, Tempe and Sydenham. Marrickville Council strongly acknowledge the need to map flood prone properties within the Alexandra canal catchment and to introduce planning controls to protect people and property from future flood damage.
As the areas are undergoing redevelopment there is a need for flood maps to establish minimum floor levels and the prohibition of structures in floodways.

Johnstons Creek Flood Study (FRMGS)

Johnstons Canal drains the suburbs of Petersham and Camperdown into Rozelle Bay. Marrickville Council strongly acknowledge the need to map flood prone properties within its portion of the Johnstons Canal catchment and to introduce planning controls to protect people and property from future flood damage. As the areas are undergoing redevelopment there is a need for flood maps to establish minimum floor levels and the prohibition of structures in floodways.

Murrumbidgee Shire Council

Darlington Point floodplain management - reconstruction of levees areas 3 - 5A (SFMP)

The levee bank at Darlington Point in its current condition poses a threat to property and community. The industry standard is to have a levee system that caters for a one in a hundred year flood. Darlington Point Levee is up to 0.5 metres short of this height. In addition the Darlington Point levee was constructed in haste to protect the town from previous flood events. This resulted in a lack of engineering design in the construction process. It was observed in the 2012 flood event that water was penetrating the existing levee structure and, while it did not fail in this instance, there were concerns it may have. This led to evacuation orders being issued for moderate floods at the cost to the government of over one million dollars per flood event.

This project aims to upgrade the levee system, engineered to protect the township from a one in a hundred year flood event. This will in effect reduce the frequency at which costly and stressful evacuations of Darlington Point will be required.

Muswellbrook Shire Council

Hunter River Flood Risk Management Plan (FRMGS)

This project will prepare a flood risk management plan, including detailed assessment of flood mitigation options and floodplain management measures, for the Hunter River.

Narrandera Shire Council

Barellan Flood Study - Floodplain Risk Management Study and Plan (FRMGS)

This project initially involves the completion of a comprehensive flood study for the Barellan township aimed at identifying and mapping areas of flood risks due to both overland flow and main stream flooding. This will then be immediately followed by the completion of a Floodplain Risk Management Study and Plan that will identify and prioritise floodplain management options aimed at reducing the impact due to flooding on the local community. This study will also assist in developing emergency management plans and assist Council in managing future development in the town.

Newcastle City Council

Newcastle city-wide flood warning signage (FRMGS)

The Newcastle City-wide Floodplain Risk Management Study and Plan (2012) Action Wa.3 calls for the installation of passive and active road signage to relay warnings, advise of flooded roads and provide other emergency information. This project will deliver this action entailing consultation with relevant stakeholders, documentation of roles and responsibilities, a review of existing flood warning infrastructure, identification of prioritised costed opportunities to add to or enhance such infrastructure (such as electronic billboards) and community education.

Scoping study Morgan Selwyn floodway Merewether Heights (FRMGS)

The Newcastle City-wide Floodplain Risk Management Study and Plan (the Plan) (2012) indicates that during the one per cent Annual Exceedance Probability, several properties lie wholly or partly within the floodway. These properties remain in private ownership. Action Priority 3 of the Plan is to investigate voluntary purchase of one or more properties within the Morgan–Selwyn floodway. This scoping study is intended to form the basis for this action by investigating flood levels and extent, and hydraulic and hazard categories, under different scenarios of building removal and/or velocity controls using numerical and/or physical models. In doing this it will evaluate the benefits of removing one or more existing buildings from within the floodway ensuring that, if and when a dwelling or structure is removed, risks to flooding are not exacerbated to other properties and will prioritise acquisition, demolition or other measures to improve the floodway.

Palerang Council

Braidwood Floodplain Risk Management Study and Plan (FRMGS)

The Braidwood Floodplain Risk Management Study and Plan will assess structural and non-structural works to mitigate or remove flood risk for the town of Braidwood. It will involve hydraulic and hydrologic modelling to determine the existing flooding issues and recommend suitable works and/or controls to protect residential dwellings and community facilities from future flooding.

Parramatta City Council

Parramatta River Catchment Mainstream Flood Study (FRMGS)

The Parramatta River is the major river passing through the Parramatta Council area, before it reaches Sydney Harbour. It passes thousands of homes and businesses, including those in the Westmead Biomedical Precinct and the Parramatta central business district (CBD), which is Australia's 6th largest CBD. Parramatta Council is developing a Floodplain Risk Management Plan for the river, which will look at methods to manage flooding in the Parramatta area, and reduce the social, economic and environmental effects of future floods.

Council has completed the first stage of developing the Plan, a literature survey, and is now moving onto creating a single, unified flood model for the Parramatta River catchment in the Parramatta Council area. The new flood model will enable options for reducing flooding to be considered and will also help determine which areas are likely to be affected by flooding after very heavy rain.

Penrith City Council

College, Orth and Werrington Creeks Catchment Overland Flood Study (SFMP)

The College, Orth and Werrington Creeks Catchment is located approximately 49 kilometres west of Sydney between St Marys and Penrith. The study area lies in the Werrington Creek Catchment between the M4 and Dunheved Road and covers parts of Orchard Hills, Caddens, South Penrith, Kingswood, Cambridge Park, Werrington and Werrington County. The study catchment has an area of approximately 1,200 hectares. The primary objective of the study is to define the flood behaviour under the existing floodplain conditions for a range of historical and design flood events. All potential flooding mechanisms will be included in the analysis including overland flow and creek flooding. The study will produce information on flood flows, velocities, levels, extents, and provisional hazard and hydraulic categories for a range of design flood events.

Little Creek Catchment Overland Flood Study (SFMP)

Little Creek Catchment is located approximately 45 kilometres west of Sydney, between Mount Druitt and St Marys. The study area lies between the M4 and Christie Street and covers parts of Oxley Park, Colyton and North St Marys. The study catchment has an area of approximately 480 hectares. The primary objective of the study is to define the flood behaviour under existing floodplain conditions for a range of design flood events in the study areas. All potential flooding mechanisms will be included in the analysis including overland flow and creek flooding. The study will produce information on flood flows, velocities, flood levels, extents, and provisional hazard and hydraulic categories for a range of design flood events.

South Creek Floodplain Risk Management Study and Plan (FRMGS)

The project will undertake a Floodplain Risk Management Study and prepare a Floodplain Risk Management Plan for the South Creek catchment.

Richmond River County Council

Water Quality Monitoring - Richmond River Catchment (SFMP)

This project will undertake water quality monitoring. The water quality monitoring is linked to the flood mitigation systems as it triggers the opening and closure thresholds (water level and pH) of the floodgate.

Richmond Valley flood warning and evacuation planning system - rural home floor (SFMP)

This project will collect ground and floor level data that can be used in flood warning and evacuation systems and detail homes that are a priority for house raising or evacuation.

Lismore rural evacuation - house floor level plan (SFMP)

This project will survey the floor levels of houses in the most impacted areas. The information will inform potential purchasers of the risks associated with individual houses in the rural area and at the same time give emergency response agencies good information on where resources should be deployed in a flood.

Flood evacuation South Lismore (SFMP)

This project will examine the option for constructing a new high level escape route to high ground for South Lismore.

Ryde City Council

Waterloo Park detention basin construction (FRMGS)

The City of Ryde experienced several large storm events in 1984, 1986, 1988 (twice), 1989 (twice) and 1990 which caused wide spread flooding. Since that period rainfall events in May 1998 and April 2003 caused significant problems.

The Flood Study and Floodplain Risk Management Study and Plan determined the nature and extent of flooding in the subject area. The area is subject to high risk. The construction of the Waterloo Park detention basin will reduce the risk of flooding of many properties at Libya Place and Waterloo Road. It will also reduce the risk of loss of life or injury to residents. The Waterloo Park detention basin makes use of the open space owned by the Council.

Shoalhaven City Council

Alexandra Street - Berry Town Creek vegetation and channel improvements (SFMP)

The Berry Town Creek vegetation and channel improvements project is the first stage of a program of works aimed to improve channel flow within the Town Creek system.

Strathfield Municipal Council

Powells Creek and Saleyards Creek Flood Study (FRMGS)

Powells Creek is a small tributary of the Parramatta River, and Saleyards Creek is the major tributary of Powell Creek. The total catchment area of Powells Creek to Homebush Bay Drive is 8.1 square kilometres and Saleyards Creek to the confluence with Powells Creek is 3.2 square kilometres. Saleyards Creek is within the Strathfield Council area and Powells Creek is within the Strathfield, Burwood and Canada Bay council areas. Council completed Powells Creek and Saleyards Creek Flood Study in 1998 using a one-dimensional model and limited ground survey. The study provided information on overland flooding along the major pipe system only.

In 2010 Council completed the Cooks River and Coxs Creek flood study using a two-dimensional model and ALS data and obtained comprehensive information on overland and mainstream flooding in the catchments.

Strathfield Council has decided to review its flood study for Powells Creek and Saleyards Creek catchments using one-dimensional/two-dimensional model and Aerial Laser Scanning (ALS) data. The revised study will include full assessment of the mainstream and overland flood behaviour for 2, 5, 10, 20, 100 and 200 year average recurrence interval and probable maximum flood in the Powells Creek and Saleyards Creek catchments. In addition Council intends to implement the same criteria for tagging of the flood affected properties that was used in the Cooks River and Coxs Creek Flood Study completed in 2010. As a result Council will obtain comprehensive information on overland and mainstream flooding for its northern catchments (Powells Creek and Saleyards Creek) identical to information acquired for Council's southern catchments (Cooks River and Coxs Creek).

Sutherland Shire Council

Bundeena Creek Floodplain Risk Management Study and Plan (FRMGS)

The Bundeena Creek Floodplain Risk Management Study and Plan will investigate various flood risk management options and provide recommendations, assess the number of properties affected by flooding and quantify the impacts of a range of potential floods on existing and proposed development.

Tamworth Regional Council

Manilla Floodplain Risk Management Study and Plan (FRMGS)

The Manilla Flood Study was completed in 2012. As a follow on, this project will allow for a Floodplain Risk Management Study to be undertaken and the preparation of a Floodplain Risk Management Plan for Manilla.

The Council of the City of Botany Bay

Mascot, Rosebery and Eastlakes Floodplain Risk Management Study and Plan (FRMGS)

This project will involve assessing the risk to life and proposing suitable flood response modification options, including an assessment of the impact of the structural integrity of dwellings, duration of inundation, potential evacuation routes and evacuation capability for both mainstream and overland flow flooding. The study will also identify any flood modification management options and assess their feasibility, effectiveness and impacts.

The Council of the Municipality of Kiama

Surf Beach Catchment - Floodplain Risk Management Study and Plan (FRMGS)

This Floodplain Risk Management Study and Plan will provide detailed technical information on the extent of flood damages to properties identified in the previous flood study as being flood affected and will analyse and recommend a management plan in consultation with stakeholders to minimise these risks.

Wagga Wagga City Council

Wagga Wagga City Council - revised Floodplain Risk Management Study and Plan (SFMP)

In 2009, Wagga Wagga City Council adopted the Wagga Wagga Floodplain Risk Management Plan. The majority of the recommendations within the plan have now been completed or are in the process of being actioned.

Since 2009 Council has been active in progressing flood mitigation activities including two updates to the 2004 Flood Study, a Major Overland Flow Flood Study and a whole of local government area flood study. The community and Council have also experienced two major flood events as well as numerous overland flood events.

The intention of this project is to revise the current Flood Risk Management Plan, including a Vegetation Management Study and a Cumulative Developments Impact Strategy. The outcome will be a revised list of flood mitigation recommendations for Council to action in the future.

Walcha Council

Walcha flood warning system - investigation and design (FRMGS)

This project is stage two of the Walcha Floodplain Risk Management Plan. Existing emergency management measures for flood warning rely on Bureau of Meteorology advice and other non-specific data. This project will provide a flash flood warning system which will use telemetry assisted rain and river gauges within the catchment to provide an earlier and more accurate flood warning. The project will also involve regular and ongoing community education and awareness programs.

Walgett Shire Council

Walgett levee upgrade - Stage 3 (SFMP)

This is the third stage of an ongoing Walgett levee upgrade project. There is one more stage to be completed other than this one. Completion of this full levee upgrade is to provide one per cent protection to the Walgett community.

Warringah Council

Narrabeen Lagoon flood mitigation (Entrance Clearance) (FRMGS)

The Narrabeen Lagoon Flood Mitigation (Entrance Clearance) project aims to reduce the risk of flooding to low-lying areas surrounding Narrabeen Lagoon in the local government areas of Warringah and Pittwater.

Over time the entrance of Narrabeen Lagoon becomes in-filled with marine sand, which significantly increases the risk of flooding to public and private property in the lagoon floodplain. These works are expected to result in the removal of approximately 45,000 cubic metres of sand from the entrance of Narrabeen Lagoon.

This will significantly reduce the flood risk to approximately 1,500 dwellings as well as numerous state and regional roads. If the works are not undertaken there could be severe socio-economic and environmental impacts.

This project is of regional importance due to the reduction in the impacts of flooding to the Wakehurst Parkway which is a key transport route to the new Northern Beaches Hospital in Frenchs Forest.

Wingecarribee Shire Council

Gibbergunyah Creek Floodplain Risk Management Study and Plan - Stage 2 (FRMGS)

The Gibbergunyah Creek Floodplain Risk Management Study and Plan will suggest measures required to be undertaken to address the flooding problems identified in the stage one Gibbergunyah Creek Flood Study.

Moss Vale Golf Course detention basin scoping study - Stage 3 (FRMGS)

The Whites Creek flows through the middle of Moss Vale township crossing the Illawarra Highway. A flood study and subsequent floodplain risk management study and plan were undertaken. In the risk management study, the construction a detention basin was found to be most appropriate measure to mitigate flooding. The basin would limit flooding of adjacent properties as well as reducing the frequency and duration of Illawarra Highway closure due to flooding.

Nattai Ponds Flood Study - Stage 1 (FRMGS)

The Nattai Ponds catchment is located partially in Mittagong and Braemar. The creek is unnamed and commonly called Nattai Ponds. There are two big residential subdivisions under development and it is expected that many will follow. It is Council's intention to undertake a flood study for the whole catchment to help plan for future strategic land use planning.

Nattai River Floodplain Risk Management Study and Plan - Stage 2 (FRMGS)

The Nattai River Floodplain Risk Management Study and Plan will prepare a risk management plan for the Nattai River catchment, Mittagong. The catchment is urban to semi urban in nature and rapid urban development is expected. The risk management plan will help Council in strategic planning to protect properties from flooding.

Robertson Village Overland Flow Study - Stage 1 (FRMGS)

The township of Robertson straddles the Illawarra Highway and has grown without a piped urban drainage system. As the town grows, Council receives flooding complaints relating to both private property and highway closure more frequently than before. As the town is situated in a very high rainfall area, a proper study will guide Council to take appropriate measures to save properties from flooding and limit the frequency and duration of Illawarra Highway closure by designing and constructing an efficient drainage system and implementing risk based controls for future development.

Wollongong City Council

Concept design of debris control structures - Allans Creek (SFMP)

This project will undertake detailed design for priority works as recommended in the Allans Creek Flood Plain Risk Management Study and Plan, to minimise blockage of culverts and prevent damage to property from significant flood events.

Concept design of debris control structures - Collins Creek (SFMP)

This project will undertake detailed design for priority works as recommended in the Collins Creek Floodplain Risk Management Study and Plan, to minimise blockage of culverts and prevent damage to property from significant flood events.

Mullet Creek (Dapto) Voluntary Purchase Scheme (SFMP)

Council continues to approach the owners of the voluntary purchase marked development within this catchment with no success to date. Council will continue to try and purchase the required properties.

Woollahra Municipal Council

Paddington Flood Study (FRMGS)

The suburb of Paddington drains into Rushcutters Bay. Woollahra Council acknowledge the need to map flood prone properties within the Paddington area where possible to introduce planning controls and construct flood mitigation works to protect people and property from future flood damage.

Wyong Shire Council

Ourimbah Creek Floodplain Risk Management Study and Plan review (FRMGS)

The Ourimbah Creek catchment is located within both Wyong and Gosford Council local government areas and is surrounded by steep escarpments which drain onto floodplains before flowing into Tuggerah Lake. Significant areas of the floodplain have experienced flooding on a number of occasions and are subject to flash flooding, watercourses overtopping and elevated water levels within Tuggerah Lake.

Wyong and Gosford councils have adopted floodplain risk management studies and plans for various areas of the Ourimbah Creek catchment however these are up to 17 years old.

Following completion of the Ourimbah Creek Flood Study in 2013, the next stage of the process is to undertake a comprehensive Floodplain Risk Management Study and Plan that includes both Wyong and Gosford local government areas. It is important that the study and plan be undertaken as one project as it recognises that any proposed works in one local government area may have an impact on the adjoining one.

Tuggerah Lakes Southern Catchments Overland Flood Study (SFMP)

An overland flood study of the Tumbi Umbi, Berkeley Vale and Glenning Valley catchments will be undertaken. This study will enable a hydraulic model to be developed for the catchments with associated flood extents, levels, depths, hazards and flood planning areas to be mapped.

Wyong River Flood Risk Management Study and Plan review (SFMP)

This project will review and update the existing Lower Wyong River Floodplain Risk Management Study and Plan using data from the recently completed Wyong River Catchment Flood Study (2013).

Wallarah Creek Flood Study (SFMP)

This study will review the existing Wallarah Creek catchment flood study and enable a hydraulic model to be developed for the catchments, with associated flood extents, levels, depths, hazards and flood planning areas mapped.

Page last updated: 03 February 2016